21 Aug
2019
21 Aug
'19
12:09 a.m.
Hi, how do you run into these things? What is it that you do that such expressions come up? On 8/17/19 14:21 , françois mendzina essomba2 via math-fun wrote:
Hello,
This identity seems true for some values of x.
But we can delete x.
Pi/4=sum(((2*n)!*(cosh(5/(x/sqrt(x^17+1)+1))/(cosh(5/(x/sqrt(x^17+1)+1))^2-1/2)-1/(sqrt(2)*(cosh(5/(x/sqrt(x^17+1)+1))^2-1/2)))^((2*n+1)/2)*cosh(((5/2)*(2*n+1))/(x/sqrt(x^17+1)+1)))/((2*n+1)*2^(4*n)*n!^2),n=0..inf);
best ragard
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